using DTS.Common.Import.ImportOptions;
using Microsoft.VisualBasic.FileIO;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace DTS.Common.Import
{
    public class CSVFile
    {
        private readonly string _filename;
        public CSVFile(string filename)
        {
            _filename = filename;
        }
        public bool IsInUse()
        {

            if (!string.IsNullOrEmpty(_filename))
            {
                try
                {
                    _ = File.ReadAllLines(_filename);
                    return false;
                }
                catch (IOException)
                {
                    return true;
                }
                catch (Exception)
                {
                    //We can supress this exception since we are interested in IOException only
                }
            }
            return true;
        }
        //FB 40598 check the format of csv and determine if is test setup or not
        public static bool IsCSVFileForTestSetupImport(string filename, CsvImportOptions csvImportOptions)
        {
            using (var parser = new TextFieldParser(filename, Encoding.GetEncoding(csvImportOptions.Encoding), true))
            {
                parser.TextFieldType = FieldType.Delimited;
                parser.SetDelimiters(csvImportOptions.FieldSeparator);
                var tokens = parser.ReadFields();


                if (tokens != null && tokens[0] == "Version")
                {
                    return true;
                }

            }
            return false;
        }

        public int LineCount
        {
            get
            {
                var count = 0;
                if (!string.IsNullOrEmpty(_filename))
                {
                    string[] lines;
                    try
                    {
                        lines = File.ReadAllLines(_filename);
                        return lines.Count();
                    }

                    catch (Exception)
                    {
                        return count;
                    }
                }
                return count;
            }
        }
    }
}